STOCKTON - It wasn't DNA evidence or even fingerprinting but good old-fashioned gumshoe work that led to two arrests in a deadly shooting last Thursday outside an East Harding Way liquor store.

Chantha Bun, 23, of Stockton was arrested Tuesday in connection with a shooting that killed 19-year-old Kevin Nhep of Oakland and wounded two 17-year-old girls, one from Stockton and one from Oakland, outside Discount Liquor, said Stockton police Officer Pete Smith. Bun was arrested on suspicion of murder and aiding or concealing a person after a felony is committed.

That arrest came several days after the arrest of a man suspected of firing a gun into the car where at least one of the shooting victims was seated when an argument escalated that night. Theara Yem, 22, of Antioch was arrested Friday on suspicion of murder, attempted murder and several weapons violations.

Smith said police do not believe those allegedly responsible for the shooting and their victims knew each other before an argument broke out late last Thursday night. He said the arrests were possible because a homicide detective followed a hunch.

"Given information we were getting at the scene when our detectives first arrived, one of the detectives had a hunch the vehicle might still be in the neighborhood," Smith said. "We got a description of a suspect vehicle, and then he takes it upon himself - he's a veteran detective - to look for it, and lo and behold."

Smith said detectives found the vehicle and were able to use it to ultimately locate the two suspects. Bun was arrested Tuesday afternoon at his home in the 1100 block of South Airport Way. Yem was arrested at work in the 1100 block of East Bianchi Road on Friday, Smith said.